admob and vanilla js for Android

I've been trying to add ADMOB to a test app for several days without success. Steps I've taken:

1. Add "@nativescript/google-mobile-ads": "^5.0.3"

2. In AndroidManifest.xml (./App_Resources/Android/src/main) add

<application..> ...
<meta-data  
android:name="com.google.android.gms.ads.APPLICATION_ID"   
android:value="ca-app-pub-3940256099942544~3347511713" />
...
</application>

3. in the app.js add

import { Application } from '@nativescript/core';
import { MobileAds } from '@nativescript/google-mobile-ads';

console.log("🔥 Inicializando Google Mobile Ads...");
MobileAds.init();

Application.run({ moduleName: 'main-page' });

Then "ns run android"

So far, I haven't been able to get it working.

Other data:
ns --version 8.9.2
windows 10 and vscode
Mi repo https://github.com/germandeburzaco/testMonetizarApp

Start by reproducing the setup with ns run android, using app.js, the AndroidManifest.xml path, and the @nativescript/google-mobile-ads package version shown in the issue. Capture the missing build or runtime error and compare the test app configuration with the plugin's documented Android setup. Done means the test app initializes MobileAds successfully and displays the expected AdMob behavior.